Visual studio Code error

Hello guys. I try to import a file from the one I made years ago with CodeBlocks. it should multiply the first number to the power of the second number(kelimasLaipsniu). Why does it show me a window always with the the word ‘something’ ? Any help would be highly appreciated.
CODE:

#include <iostream>
#include <cmath>

using namespace std;
void kelimasLaipsniu(int a,int b)
{
    int temp=a;
    for(int i=1;i<b;i++)
    {
    temp=temp*a;
    }
cout<<temp<<endl;
}



int main()
{

kelimasLaipsniu(5,4);


    return 0;
}

This might be a silly question, but did you save? The screenshot shows unsaved edits.

Yes, I did save it! Always. Im just a noob trying to figure the functions of visual code which is a mystery